| 释义 |
Figure T-3 At the transmitting end of the circuit, the mux scans the buffers associated with the ports to which individual devices are attached. Each device port is allocated a channel in the form of a time slot on the aggregate line for transmission of data. Using T1 as an example, the transmitting TDM mux relieves each buffer of an 8-bit sample of data, beginning with buffer/port #1 and proceeding in sequence through buffer/port #24, and transmits the bytes, in sequence, across the circuit, interleaving them into a frame of data. The 74570c20.qxd 9/12/07 12:44 AM Page 480 |